header {
  width: 100%;
  height: 64px;
  box-shadow: 0 2px 8px #f0f1f2;
  z-index: 10;
}
#nav {
  font-size: 14px;
}
ul {
  list-style: none;
}
li {
  text-align: center;
}
.header nav,.header ul,.header li,.header a {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  height: 100%;
  line-height: 64px;
}
.header li {
  display: flex;
  flex-direction: row;
  align-items: center;
}
#nav a {
  text-decoration: none;
  color: #314659;
  padding: 0 8px;
  margin-left: 38px;
  border-top: 2px solid transparent;
  border-bottom: 2px solid transparent;
}
#nav a.selected {
  border-top: 2px solid #1890ff;
  border-bottom: 2px solid transparent;
  color: #1890ff;
}
#nav a:hover {
  border-top: 2px solid #1890ff;
  border-bottom: 2px solid transparent;
  color: #1890ff;  
}
.header {
  justify-content: space-between;
}
.header .title {
  margin-left: 36px;
  font-size: 16px;
  letter-spacing: 2px;
  font-family: monospace;
  font-weight: 600;
}
#nav {
  margin-right: 36px;
}
.header .highlight {
  font-size: 18px;
  margin-right: 6px;
  margin-top: 2px;
}